The outside for a charge stage in resolution expanded system of transmitting television pictures, transmission system, which comprises such a stage and receiver stage for such a system.

摘要

Stage for emitting signals corresponding to television pictures, and in which there are associated with means for transmitting at least one video extension signal for a picture characteristic in at least one transmission channel, means of scrambling at least a fraction of the said extension signal(s), and reception stage comprising corresponding reception and deciphering means. These stages are intended most particularly for a television picture transmission system in which one or more video signals for extending the format of the pictures and for extending the horizontal and vertical definitions of the said pictures are emitted and transmitted superimposed on the conventional video signals corresponding to the original pictures, the said extension signals having undergone, prior to transmission, a circular permutation starting from a cut-off point defined for each line with the aid of a generator of pseudo-random sequences. …IMAGE…